Dr. Gaziano is an internationally recognized chronic disease epidemiologist whose research interests include the epidemiology of chronic diseases using large data sources. A centerpiece of his research involves the conduct of observational studies and trials that are imbedded in a health care system and the curation of electronic health data from many sources. He serves as PI of the Million Veteran Program (MVP) which is expected to enroll one million veterans into a longitudinal cohort with stored biospecimens, self-reported data and the rich electronic clinical and administrative data available in the VA. To date over 612,000 veterans have been enrolled. He is also principal investigator of the Physicians' Health Study, a large-scale trial-based cohort of over 29,000 physicians followed for over 30 years and has served as PI, Co-PI or co-investigator on many other cohort studies and large-scale trials. He serves on advisory committee of the UKBiobank.